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(No Model.) 2 sheets sheet 1. P. W. BRUNDIN.

VENETIAN BLIND. No. 601,612. Patented Mar.' 29, 1898.

Q; i m l W W I i W! gm g Ii} ,l I INVENTOR: WITNESSES; w w

Attorney.

(No Model.) 2 Sheets-Sheet 2 P. W. BRUNDINQ VENBTIAN BLIND.

No. 601,612. Patented Mar 29,1898.

- INVENTOR:

WITNESSES:

Attorney.

UNITED STATES" PATENT PER WVALFRID BRUNDIN, OF NEW YORK, N. Y., ASSIGNORTO THE NEW YORK VENETIAN BLIND COMPANY, OF SAME PLACE. v

VENETIA N BLIND.

SPECIFICATION forming part of Letters Patent No. 601,612, dated March29, 1898. Application filed December 28, 1896. Serial No. 617,198. (Nomodel.)

To all whmn it may concern.-

Be it known that 1, PER WALFRID BRUN- DIN, a citizen of the UnitedStates, and a resident of New York city, in the county and State of NewYork, have invented certain new and useful Improvements in VenetianBlinds, of which the following is a specification.

My invention consists of improvements in the construction of some of theparts of Venetian blind apparatus whereby it is designed to providesimpler and more efficient apparatus for operating and controlling theblinds, as hereinafter described, reference being made to theaccompanying drawings, in which- Figure 1 is a front elevation of partsof a Venetian blind constructed according to my invention, with a partin section; Fig. 2, an elevation in a view at right angles to that ofFig. 1, also with a part in section. Fig. 3 is an elevation in a view inthe opposite direction of that of Fig. 2. Fig. 4 is a detail, partly infront elevation and partly in longitudinal section, of the roller; andFig. 5 is an end view of the roller, side view of a pawl for looking it,and a section of a pawl for controlling the action of the locking-pawl.Fig. 6 is a detail, partly in front elevation andpartly in section,showing a modified construction of apparatus for insuring release of theroller-holding pawls for letting the blind down. Fig. 7 is a section ofFig. 6 on line 2 2.

The slats a are suspended from a rockerbar I) by the straps c, as usual,but the rocker is pivoted at e, concentrically in the hangers 61 insteadof eccentrically, and a coiled spring f is arranged in the rocker and inconnection with the non-rotatable pivot-rod g for normally turning therocker to close the slats, as represented in Fig. 1, but the use of thespring is alike applicable with the eccentrically-ar ranged rockerdepending on the gravitating action of the heavy side for closing theslats which is sometimes employed.

The rocker bis provided at one end with a crank it for opening theslats, as represented in Fig. 2, by means of a cord 7 the crank beingarranged at such an angle that by pulling the cord downward andfastening it on a stud, button, clasp, or other fastener in a suitableposition, or being held by a counterbalance-weight, as y, the slats Willbe held open. Instead of arranging this pull-cord i to hang directlyfrom the end of the crank and subjecting the operator to the labor ofcontracting the spring by direct action I have connected it by apulley-block j, connected by cord j to the crank, with the pullcord 11connected to ahook k at the top of the window-frame and passed throughsaid block, and a guide 1 also at the top of the windowframe, wherebythe operation is made easier, as will be well understood.

The usual roller m, slat-raising cord 71, and pull-cord o are employedfor raising the slats, as shown in Fig. 2. Also one or moreratchet-notches p in the stationary pivot-hub q and pawls s on the endof the roller are employed for locking the roller and holding up theslats.

To facilitate the release of the locking-pawl when it is desirable tolet the slats down it is customary to first pull the roller by a jerk onthe cork 0 in the reverse direction to thrust out the pawl, so that whenthe pull on the cork 0 is released the pawl will escape the notch andthe slats will descend. It will be seen that to insure this operationwhen the slats are raised to the uppermost limit there must always besome slack space above the position in which the uppermost slat comes torest when the pawl locks the roller, for if the locking should occurcoincidently with the contact of the upper slat with the rockerbar theroller could not respond to the jerk for throwing out the pawl. I havetherefore provided means for insuring such slack which, as representedin Figs. 1, 2, 3, and 4, may consist of the weighted pass-over pawl t onthe pivot 11. and in such relation to the notch 19 that it will lodgetherein, so that the pawls s will pass over it and a predetermineddistance beyond the shoulder of the notch when the slats are beingraised and then drop into the notch above said passover pawl and willthrust it out of the notch and return to the shoulder of the notch forlocking, thus insuring the requisite slack for enabling the locking-pawlto be jerked out of the notch.

Although the length of the cords 11 may be so adjusted relatively to thepawls s on the roller and the pawl-engaging notch that such slack may beprovided for at first-,the cords;

. y ivairys i j nsth y hy r s pic a t n 7 V and other causesthattherewould be times when thereleasing of the roller would; be difif;

v cult ithout this provision.

The passoyerpawjlmay be constructed invarious different Ways provided itwill lodge :in' the notch, so that pawls s will pass over it,and. itwill be displaced properly for locking theroller, as represented. inFigs; 1 to 5,

Q V j inclusive. 7 It is provided with a stop 17, which hhhbxtendingdown along the bracket d, in

. Whichtherollerjmand the rocker-bar are piv-- .Vijded therefor in the;pivot-holes e, arm a: wil-lbe elevated, so: that a pawl fs, that wonld'WllihOllt said arm engage thenotch p with ini snfliciehgt slack :forrelease, iwill'be' prevented bears against 7 the operative end uptoo'highflnFigs: Sand 7 thispass-over pawlfis represented as an'arm a ofa. rod 1),

resting in the notch 19' of the hubq, said rodoted and Connected to thepivot d of the rooker-barin such manner that 7 said rocker bar beinglifted by the slats when :pullednptightly against it, suitable slackbeing profrom: engaging atall, whereby the slats will Qjdrop cajusingthea'rm'to drop also,'and the .nextpawl will drop-in the notch and lockthe} roller, thnsinaintaining ample slack for rer lease; 7 Othercontriyances: may also be anf'ranged for this-purpose, and I do: notlimit 1 nyfself to any particular device therefor.

I claim-- V 1. (In. ja Vejnetiajn. blind; the: combination r with theslats, slat-suspending straps, and

the slat-raising roller, of the slat opening and closing rocker-bar anda spring for actuating said rocker-bar for closing the slats, saidrocker having the pull-cord for opening the slats substantially asdescribed.

2. In a Venetian blind, the combination with the slats, slat-suspendingstraps, and the slat-raising roller, of the slat opening andslat-raisingroller, of the slat opening and V thehracket to prevent the :'Weightfrom thrusting by th o k -tweet r closing rocker-bar; spring foractuating the V i Y .rockerbarto close the slats,pu1l-cord for actuating therocker-bar to open the slats, and V V a connterbalanceweighttohold the slats open substantially as described;

- 5-.-The combination with the'sl'at-raising roller, locking-pawlsj andnotched hub, of a pass-over pawl adapted to lodge in the lock:

' ing notch and prevent the locking pawls from i V locking'the rollerwithout 'slack'for jerking the pawls free substantially as described.

; r The; combination with the slat-raising $0 1611, locking-{ arvis and}notched hub, ;of'a.

pass-over pawl adapted to lodge in the lockrollersubstantially asdescribed.

'ing-notchandprevent the'locking-pawls from V V 7 locking the rollerWithout slack for jerking I the pawls free, and means fordisplaeing saidl =pass-overpawl preparatory to locking the" The combination with theslat raising roller-,locking-pawls and notched hub, of a i r gravitatingpass-over pawl adapted to lodge :inthe locking-notch andpreVcntthclockingj i j j Zpaw'ls from'lockingthe.'roller'withont'slaclei f iorjerking'the pawlsfree,and'tobedisplaced L. V f

' ratory'tolocking the roller substantially-as described-j I r 8.1m aVenetian blind,ithe'combination with the sl ats andfslatsnspe'ndifnstraps, 'of a V i i V slatopening and closing rockei bar, and

spring for closing the slats, said; rocker having a pull-cord-foropening the slats substan-' tially as described.

9; In a Venetian. blind, the combinationwiththe.slats,slat-suspending:strape,;slat i opening and closingrocker-bar,and the spring for closing the slats of the pulley-block and9 pull-cord to open the slats, substantially as described.

10. In a Venetian blind, the combination with the slats, slat-suspendingstraps, slat opening and closing rocker-banand the spring for closingthe slats, of the crank attached to the rocker-bar, pulley-blockconnected to the crank, and the pull-cord connected to a hook attachedto the Window-frameabove the crankarm and passed through said block, andthrough a guide-eye also attached to the Window-frame above thecrank-arm all substantially as described.

Signed at New York city, State of New York, this 17th A. D. 1896.

in the county and day of December,

PER VVALFRID BRUNDIN.

Witnesses:

W. J. MORGAN, A. P. THAYER.

It is hereby certified that in Letters Patent No. 601,612, granted March29, 1898, upon the application of Per Walfred Brundin, of New York, N.Y. for an improvement in Venetian Blinds, errors appear in the printedspecification requiring correction, as follows: On page 1, lines 74 and76, the word cork should read cord; and that the said Letters Patentshould be read with these corrections therein that the same may conformto the record of the case in the Patent Office.

Signed, countersigned, and sealed this 5th day of April, A.'D., 1898.

[SEAL.] WEBSTER DAVIS,

Assistant Secretary of the Interior. Countersigned O. H. DU'ELL,

Commissioner of Patents.

